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I just can't make pure blue (R=0,G=0,B=255) circle. It says "out of gamut warning". If I press "fix" or something, it makes color black but not blue.

I don't need this "service".

How to bother out such things as "gamuts" and that similar staff?

I want each object be the color I want, not somebody regard as "correct".

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What is the document color mode? (File menu) It should be set to RGB. – Scott Nov 17 '13 at 3:31
Yes, it was CMYK. – Suzan Cioc Nov 17 '13 at 18:52
up vote 2 down vote accepted

Ensure the Document Color Mode is set to RGB if you wish to use RGB colors.

File > Document Color Mode

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